iris: allow compression conditionally for images on gen12

iris: allow compression conditionally for images on gen12

With this change, amount of resolves happening with deqp-gles31
(--deqp-case=*load_store*) drops ~50%.

v2: use iris_image_view_get_format to get the format,
    get devinfo from context instead of passing it (Nanley)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4080>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4080>